Comment 17 for bug 1535115

AI can do some calculations by itself and then predict if the map is good to make huge empire. On small maps predictions about roads are not so important (time loses there are smaller than 20% while on big ones it can be more than 100%). So there are very strict rules about "how to predict that the map is big".
But adding rules for AI how to predict the map type can cause other, bigger problems. That can be done not smart enough...
We can think about solving the road problem with existing terrain and building situation. If you have to link all buildings in smart way. Before that it is very easy to stop for a while part of the economy where terrible traffic jam is. Then wait about 2-3 minutes till traffic jam will no exists any more of mainly will disapear and dismantle the roads. Then link the buildings with building correct (and straight) roads around. Then the problem should be solved.
Of course rules for stopping the economy + dismantling the roads should be complex (for example counting some "points"). Also it should be considered if a foresters are nearby (problems with big woods which are unpassabel for roads).
But in my opionion it can be done after build-19. Too many bugs can happened there...